Outcomes of Stenotrophomonas maltophilia hospital-acquired pneumonia in intensive care unit: a nationwide retrospective study

Table 2 Characteristics of Stenotrophomonas maltophilia hospital-acquired pneumonia

Variables	Total N = 282
Monomicrobial pneumonia (S. maltophilia only) (n, (%))	117 (41.6)
Other microorganisms identified (polymicrobial) (n, (%))
Acinetobacter baumanii	7 (4.3)
Citrobacter spp.	7 (4.3)
Enterobacter spp.	30 (18.3)
Enterococcus spp.	6 (3.7)
Escherichia coli	25 (15.2)
Haemophilus	3 (1.8)
Hafnia alvei	3 (1.8)
Klebsiella spp.	25 (15.2)
Methicillin-resistant Staphylococcus aureus	3 (1.8)
Methicillin-sensitive Staphylococcus aureus	13 (7.9)
Morganella morganii	1 (0.6)
Proteus spp.	7 (4.3)
Pseudomonas aeruginosa	49 (29.9)
Serratia spp.	8 (4.9)
Streptococcus spp.	1 (0.6)
Others	10 (6.1)
S. maltophilia pneumonia-related manifestations (n, (%))
Associated bacteremia	20 (7.1)
Associated empyema thoracis	25 (8.9)
Associated septic shock	123 (43.6)
Total number of days of norepinephrine infusion (median [IQR])	0 [0–6]
Severity of pneumonia
Oxygenation level regarding S. maltophilia HAP (n, (%))
Hypoxemia with PaO₂/FIO₂ > 300 mmHg with PEEP ≥ 5 cmH₂O	45 (16)
Mild ARDS	98 (34.7)
Moderate ARDS	101 (35.8)
Severe ARDS	36 (12.7)
Prone positioning (n, (%))	13 (4.6)
ECMO requirement	15 (5.3)
Veno-venous	8 (53.3)
Veno-arterial	7 (46.7)

Data is presented as number (%) or median [IQR]. Mild ARDS (200 mmHg < PaO₂/FiO₂ ≤ 300 mmHg with PEEP ≥ 5 cmH₂O), moderate ARDS (100 mmHg < PaO₂/FiO₂ ≤ 200 mmHg with PEEP ≥ 5 cmH₂O), severe ARDS (PaO₂/FiO₂ ≤ 100 mmHg with PEEP ≥ 5 cmH₂O)
S. maltophilia, Stenotrophomonas maltophilia; ARDS, Acute Respiratory Distress Syndrome, was defined according to the Berlin definition; PEEP, positive end-expiratory pressure

ISSN: 1364-8535